Editing Reversi (section)

=== Brightwell Quotient ===
Invented by the British mathematician and three times runner-up at the World Championship and five times British Champion [[Graham Brightwell]], this is the tie-breaker that is now used in many tournaments including the W.O.C. If two players have the same number of points in the thirteen-round W.O.C. Swiss, the tie is resolved in favour of the player with the higher Brightwell Quotient.{{cn|date=June 2024}}

The Brightwell Quotient (BQ) is calculated as follows:<ref>{{Cite web |title=Britishothello.org.uk |url=http://britishothello.org/wp-content/uploads/2018/08/BOFRules.pdf |url-status=dead |archive-url=https://web.archive.org/web/20190218021133/http://britishothello.org/wp-content/uploads/2018/08/BOFRules.pdf |archive-date=18 February 2019}}</ref>
# A constant ''c'' is calculated. It is the integer nearest to (number of squares on the board) divided by (number of rounds in the tournament).
# If any of the player's opponents have withdrawn in the course of the tournament, or if a player has been paired against ''[[Bye (sports)|bye]]'', ignore such games for the moment. 
# Calculate the total number of disks scored by the player in all games not covered by step 2 and add ''c'' times the sum of points scored by all of the player's opponents, except those who have withdrawn.
# For each game against an opponent who has withdrawn, and each bye received, add half the number of squares on the board plus (''c'' times the player's own tournament score) to the result calculated in step 3. The number resulting is the player's BQ.